sawyer



@uitrit tette @sind @ffice IMPROVED COMPOSITION 0F MATTER POR G METAL.

E sPLF:CLJFEIICLfyI'IIC:N.` TO ALL WHOM IT MAY CONCERN:

Be it known that I, ADDISON SMN-TER, ot"` Athol, in the county of Worcester, audState of Massachusetts,

have invented a new and useful Composition of Matter for Polishing or Securing Metals audiorhcr hard substances,

and I lo hereby declare that the following is uw full, clear, and exact description of the` method of making and using the sume7 taken in connection with the accompanyingdrawing, in `whicl1 Figure 1 is a vertical section through the centre of a device -for scouring cutlery or other fiatsurfacef which is constructed according to my improved method; and

Figure 2 is a plan of the saine. l The subject-matter of my invention relates to the method of making'a. scouring or polishing surfaceor material which may be applied to a variety of purposes, when the grinding, polishing, or scouring of hard i surface is required to be done, and consists, in `the first place, in forming the polishingsnrfaceof a mixture of'` emery and soft vulcanized India rubber, as it is called, in such proportions that the'rubber` will hold the emery firmly, and at the same time retain so much of its elasticity or flexibility as will permit the surface to coliform in a measure to the form of the` object to be scoured.; and in the second place, in attaching a thin sheet or layer of this compound to a backing of soft vulcanized rubber of'any suitable form, to gire strength andsupport to .the layer of polishing compound, and permit it to adapt itself to the surface to which it is to be applied.

The drawings represent a pad or eushioinuxirde in this manner, for scourinror table knives and for other similar uses, the lower surface of which, a, for about one-tenth of an inch in thickness, is made of a mixture of emery and soft rubber, in the proportions, say, of frou1,five to eight parts by Weight of emery, to one of rubber, more or less, according to the purpose for which it is to he used, and to the iincuess of the einery. Thepart, `b, is made of common soft vulcanized rubber of any convenientI form, the part, c, sci-ving for a handle by which` it is held by the user. In making the composition for scouring paint, I make the proportion of `emery to rubber i about four to one of rubber, and in using fine emery, I5 make the proportions a little greater than with coarse grades. For common scouring I have used emery of the grade known in the market usNo. 90, and in sonic cases ner. i A p i The manner of constructing this device is as follows: The emery and rubber, with the usual vulcauiziuror` materials, are mixed by grinding or masticating them between rollers, and formedinto a sheet, as in the usual way of making sheet rubber; a piece of thissheet is then cut to the required forni for the polishing face, and I is laid in the bottom of a mould` of such form asis desired to be given to the piece; thc rest of the mould `is then filled with 'common soft rubber in the plastic condition, which adheres to the first layer. `The wlioleis then vulcanized by heat in the usual Way. Although my invention is shown in the drawings only as applied toa. i scouring pad, it is obviously applicable in other forms to the general purpose of scouring `wood, metals,` stone,

paint, and sharpening cutlery, and a. variety of uses of the same general character.

Having thus described my invention,` what I claim, and desire to .secure byLetters Patent, is as follows: i I do not cla-Lim forming a. compound of emery and hard rubber, such as is known as vulcanite,"as that has been made before my invention but I claim;-

1. -Thc polishing` compound of emery and soft"'vulcanized rubber, made substantially as described.

2. The forming of the surfaces of `polishingor sdouring devices, by .means of a thin layer of the vpolishing i compound before described, united to a backing of soft vulcanized rubber, substantially as described. Executed at Athol, this thirty-first day of May,'1866.

n A. M. SAWYER.

Witnesses:

Oris VJ'. STooKWELL, WALTER Tueur. 

